A fluid guiding structure and a plate and shell heat exchanger using the same
By using multi-layer spring plates and staggered groove structure in plate heat exchangers, the problems of fluid short-circuiting and dead zones in traditional plate heat exchangers are solved, thereby improving the heat exchange efficiency and heat exchange effect of the fluid.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- EXXON (SUZHOU) HEAT TRANSFER TECH CO LTD
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional plate heat exchangers have limitations in fluid distribution uniformity, pressure drop control, and anti-fouling capabilities, which can lead to short circuits or dead zones in fluid flow, resulting in low plate heat exchange efficiency.
Multi-layer spring plates are used to tightly adhere to the inner wall of the shell to form lateral flow obstruction. Combined with staggered grooves and interactive plate structures, this ensures that the medium flows evenly into the channels between the heat exchanger plates, increasing the contact area of the heat exchange path.
It effectively prevents medium short circuits and dead zones, improving the heat transfer efficiency and heat exchange effect of the fluid between the plates.
Smart Images
Figure CN224415830U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat exchanger technology, and in particular to a fluid-directing structure and its application in plate heat exchangers. Background Technology
[0002] Plate heat exchangers, as highly efficient and compact heat exchange devices, are widely used in petrochemical, energy, and refrigeration industries. Their core advantage lies in achieving a balance between high heat transfer efficiency and structural compactness through the combined design of plates and shells. However, traditional plate heat exchangers have limitations in fluid distribution uniformity, pressure drop control, and anti-fouling capabilities. Short circuits or dead zones can easily occur in the fluid flow between the plate bundles and the shell, leading to low heat exchange efficiency in some plates and a decline in overall heat transfer performance. Utility Model Content
[0003] To address the problem of low heat exchange efficiency caused by short circuits or dead zones in existing plate heat exchangers when the medium flows between the plates, this application provides a fluid guiding structure and its application in a plate heat exchanger.
[0004] The fluid guiding structure and its application in a plate heat exchanger provided in this application adopt the following technical solution:
[0005] A fluid guiding structure includes multiple heat exchanger plates arranged in parallel. A flow-blocking plate for guiding fluid is provided on one side of the surface of each heat exchanger plate. A positioning block is fixed on one side of the middle of the flow-blocking plate. A spring pressure plate slot for positioning is provided on the middle of the flow-blocking plate on the side of the positioning block. A slot seat for fixing the spring pressure plate slot is provided on one side of the spring pressure plate slot. Multi-layer spring pressure plates for pressing the heat exchanger plates are provided at both ends of the side of the spring pressure plate slot away from the slot seat.
[0006] By adopting the above technical solution, when the hot and cold medium entering the shell flows along the surface of the heat exchanger plates, the multi-layer spring plates are pressed tightly against the inner wall of the shell by the force of the fluid flow, so that the multi-layer spring plates are tightly attached to the inner wall of the shell, forming a side flow resistance effect to stop the flow of the medium. After the medium changes its original flow direction, it flows evenly into the channel between the heat exchanger plates, preventing the generation of side flow and improving the heat exchange efficiency of the plates.
[0007] Preferably, multiple rows of flow guide grooves are arranged and fixed on the surface of each of the heat exchanger plates, and the multiple rows of flow guide grooves are arranged in a cross-flow distribution to form staggered grooves.
[0008] By adopting the above technical solution, the interlaced grooves formed by the intersecting of multiple rows of guide plates increase the flow path length of the hot and cold media, and control the flow rate of the hot and cold media in the flow channel by diverting and interlacing, thereby helping to improve the heat exchange effect of the hot and cold media.
[0009] Preferably, each of the multiple rows of guide trough plates has an interactive plate protruding from its surface, and each of the multiple heat exchanger plates has an interactive inclined groove on the side facing the interactive plate, and the interactive inclined groove is interlocked with the interactive plate.
[0010] By adopting the above technical solution, the interactive plate is inserted into the interactive inclined groove, so that when the interactive plate guides the heat medium of its own heat exchanger plate, it receives the heat exchanged by the heat medium on the surface of the heat exchanger plate on the adjacent side, thereby forming heat crossover and improving heat exchange efficiency.
[0011] Preferably, the top row of the plurality of interactive panels has an upper snap-fit surface on one side of the top of the interactive groove, and the row of the plurality of interactive panels adjacent to the one with the upper snap-fit surface has a lower snap-fit surface on one side of the one with the bottom of the interactive groove.
[0012] By adopting the above technical solution, both the upper and lower contact surfaces abut against the inner wall of the interactive groove, thereby maintaining the fixed connection between the interactive plate and the interactive groove.
[0013] Preferably, the multiple upper and lower contact surfaces are based on multiple rows of interactive boards and are distributed at intervals from top to bottom.
[0014] By adopting the above technical solution, multiple upper and lower contact surfaces are spaced apart on the surface of multiple rows of interactive plates, thereby connecting with multiple rows of interactive inclined slots. This allows the multiple rows of interactive plates to be inserted into the multiple rows of interactive inclined slots. The groove distribution formed by the upper and lower contact surfaces provides reverse tension to the interactive inclined slots, improving connection stability and preventing loosening.
[0015] Preferably, the surfaces of the multiple heat exchanger plates are provided with output straight grooves at the bottom of the staggered grooves.
[0016] By adopting the above technical solution, the opening of the output straight groove can divert and summarize the flow of the medium after heat exchange, which facilitates the discharge of the medium flow.
[0017] Preferably, a front sealing plate is provided on both sides of the surface of the plurality of heat exchanger plates, and a rear sealing plate is provided on the other side of the front sealing plate of the plurality of heat exchanger plates, and the plurality of front sealing plates are sealed to the rear sealing plate on the adjacent side.
[0018] By adopting the above technical solution, the front sealing plate is sealed to the rear sealing plate on the adjacent side, so that the two adjacent heat exchanger plates are sealed on both sides, and the hot and cold medium pipes are connected to the upper and lower ends of the heat exchanger plates.
[0019] A plate heat exchanger for the aforementioned fluid guiding structure includes a plate heat exchanger housing disposed on the surface of heat exchanger plates and located at the ends of two multi-layer spring plates, wherein the bottom ends of the plate heat exchanger housing are covered and fixedly connected to the surface of the heat exchanger plates.
[0020] By adopting the above technical solution, the multi-layer spring pressure plate is subjected to the thrust generated by the flow of the medium, thereby pressing against the shell of the plate heat exchanger, forming an overall stable heat exchanger plate, and at the same time providing a force fulcrum for the multi-layer spring pressure plate to generate reaction force.
[0021] In summary, this application includes at least one of the following beneficial technical effects:
[0022] 1. By using multi-layer spring plates to tightly adhere to the heat exchanger shell, a lateral flow obstruction effect is created on the medium fluid. This obstructs the medium fluid during its flow, changes the flow direction, and directs it evenly into the channels between multiple heat exchanger plates, preventing bypass flow and avoiding problems such as medium short circuits or dead zones.
[0023] 2. By inserting an interactive plate into the interactive groove, the medium flows between multiple heat exchanger plates and undergoes initial heat exchange with the heat exchanger plates. Then, the medium flows along the interactive plate into the interactive groove and receives heat exchanged by adjacent heat exchanger plates. Thus, secondary heat exchange occurs between the medium and adjacent heat exchanger plates through the interactive plate, increasing the contact area of the heat exchange path and improving the heat exchange efficiency. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the internal structure of the plate heat exchanger shell of this application;
[0025] Figure 2 This is a schematic diagram of the front end of the heat exchanger plate in this application;
[0026] Figure 3 This is a schematic diagram of the rear end of the heat exchanger plate in this application;
[0027] Figure 4 This is an enlarged schematic diagram of section A in this application;
[0028] Figure 5 This is an enlarged schematic diagram of section B in this application.
[0029] Reference numerals: 1. Heat exchanger plate; 2. Flow-restricting plate; 3. Positioning block; 4. Slot seat; 5. Multi-layer spring pressure plate; 6. Spring pressure plate slot; 7. Plate heat exchanger shell; 8. Flow guide plate;
[0030] 9. Interactive board; 10. Upper card contact surface; 11. Lower card contact surface; 12. Interlaced slot; 13. Output straight slot; 14. Front sealing plate; 15. Rear sealing plate; 16. Interactive inclined slot. Detailed Implementation
[0031] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.
[0032] This application discloses a fluid guiding structure.
[0033] Example 1
[0034] Reference Figure 1 A fluid guiding structure includes multiple heat exchanger plates 1, which are all center-aligned and arranged horizontally side by side. A flow-blocking plate 2 is fixed on one side of the surface of the multiple heat exchanger plates 1. A positioning block 3 is fixed on one side of the middle part of the flow-blocking plate 2. A spring pressure plate slot 6 is provided on the side surface of the flow-blocking plate 2 at the front end of the positioning block 3. The spring pressure plate slot 6 is double S-shaped, and multiple layers of spring pressure plates 5 are fixedly engaged in the two S-shaped grooves of the spring pressure plate slot 6. A slot seat 4 is fixed in the S-shaped groove on the other side of the spring pressure plate slot 6 away from the multiple layers of spring pressure plates 5. One end of the slot seat 4 away from the spring pressure plate slot 6 is fixed to the side surface of the flow-blocking plate 2, and one end of the side surface of the slot seat 4 is fixedly connected to the side surface of the positioning block 3.
[0035] Example 2
[0036] Reference Figure 1 A plate heat exchanger for use in the aforementioned medium guiding structure includes a plate heat exchanger housing 7 disposed on the surface of a heat exchanger plate 1. One end of the inner surface of the plate heat exchanger housing 7 abuts against the ends of two multi-layer spring pressure plates 5, and the bottom ends of both ends of the plate heat exchanger housing 7 are fixed to the surface of the heat exchanger plate 1, thereby forming a covering arrangement for the slot seat 4, the multi-layer spring pressure plates 5, and the spring pressure plate slot 6.
[0037] When the medium entering the plate heat exchanger housing 7 flows along direction A or B, the multi-layer spring pressure plate 5 receives the thrust generated by the medium flow, thereby pressing the multi-layer spring pressure plate 5 as a whole against the inner wall of the plate heat exchanger housing 7, forming an interaction force to maintain a tight fit. At the same time, the multi-layer spring pressure plate 5 tightly adheres to the plate heat exchanger housing 7, thereby creating a lateral flow obstruction effect on the medium fluid, preventing the medium fluid from flowing during the process, causing the medium to change its original flow direction and flow evenly into the channels between the multiple heat exchanger plates 1, preventing the generation of bypass flow, and avoiding the problems of medium short circuit or dead zone.
[0038] Reference Figure 2 , Figure 3Multiple heat exchanger plates 1 are provided with multiple rows of guide channels 8 on their surfaces. Each row of guide channels 8 is composed of multiple 60° inclined rhomboid blocks, and each rhomboid block is spaced with a pre-reserved channel. The multiple rows of guide channels 8 are arranged sequentially from top to bottom on the surface of the heat exchanger plates 1. The rhomboid blocks in each row of guide channels 8 are connected by intervals to form staggered channels 12. The staggered channels 12 extend downward along the multiple rows of guide channels 8, and an output straight channel 13 is opened at the bottom of the staggered channels 12. The output straight channel 13 is connected to the external medium outflow pipeline (one side of the multiple heat exchanger plates 1's guide channels 8 faces the medium input pipeline, and one side of the output straight channel 13 faces the medium output pipeline). The multiple rows of guide channels 8 are arranged in a cross-flow distribution to form the staggered channels 12.
[0039] Multiple heat exchanger plates 1 are arranged side by side with adjacent heat exchanger plates 1. Front sealing plates 14 are protruding from both sides of the front end of multiple heat exchanger plates 1. Rear sealing plates 15 are protruding around the rear end of multiple heat exchanger plates 1 along the path of the front sealing plates 14. When two adjacent heat exchanger plates 1 abut, the front sealing plate 14 and the rear sealing plate 15 abut tightly. The surfaces of the front sealing plate 14 and the rear sealing plate 15 are provided with an adhesive coating. The coating material uses high-temperature resistant inorganic adhesive HR-8767, which can withstand a maximum temperature of 800℃.
[0040] It should be noted that two adjacent heat exchanger plates 1 are connected to the rear sealing plate 15 through the front sealing plate 14. Since the front sealing plate 14 and the rear sealing plate 15 protrude from the surface of the heat exchanger plate 1, a sufficient medium flow path is ensured between the two adjacent heat exchanger plates 1. At this time, the two adjacent heat exchanger plates 1 are sealed on both sides and connected to the outside at the top and bottom. The hot and cold medium pipes are connected to the staggered groove 12 and the output straight groove 13 at the top and bottom of the heat exchanger plates 1.
[0041] Reference Figure 3 , Figure 4 , Figure 5 An interactive inclined groove 16 is formed on the rear surface of the heat exchanger plate 1 at the position of the multi-row guide groove plate 8. The outer shape of the interactive inclined groove 16 is consistent with the rhomboid block of the guide groove plate 8, and the width of the channel of the interactive inclined groove 16 is smaller than the width of the rhomboid block of the guide groove plate 8, thereby preventing the guide groove plate 8 from being inserted into the interactive inclined groove 16. At the same time, an interactive plate 9 is protruding and fixed on the surface of the guide groove plate 8 at the position of the interactive inclined groove 16. The shape of the interactive plate 9 is consistent with the channel of the interactive inclined groove 16, and the width of the interactive plate 9 is smaller than the interactive inclined groove 16. Thus, when two adjacent heat exchanger plates 1 are abutted and fixed to each other, the guide groove plate 8 of one heat exchanger plate 1 abuts against the interactive inclined groove 16 of the other heat exchanger plate 1, and the interactive plate 9 is inserted into the interactive inclined groove 16.
[0042] Among them, the top of the first row of interactive plates 9 on the surface of the heat exchanger plate 1 has an upper snap-fit surface 10 with the top of the side surface facing downward. The upper snap-fit surface 10 has a 90° opening surface on its upper end surface. The upper snap-fit surface 10 abuts against the top of the inner wall of the interactive inclined groove 16 and the 90° opening surface of the upper snap-fit surface 10 snaps against the top of the groove opening of the interactive inclined groove 16. The second row of interactive plates 9 on the surface of the heat exchanger plate 1 from top to bottom and located at the bottom of the upper snap-fit surface 10 has a lower snap-fit surface 11. The shape of the lower snap-fit surface 11 is the same as that of the upper snap-fit surface 10. The lower snap-fit surface 11 abuts against the bottom of the inner wall of the interactive inclined groove 16 and the 90° opening surface of the lower snap-fit surface 11 snaps against the bottom of the groove opening of the interactive inclined groove 16. The upper snap-fit surface 10 and the lower snap-fit surface 11 are arranged in a series of alternating combinations on the side surface of multiple rows of interactive plates 9.
[0043] It should be noted that the upper snap-fit surface 10 is stressed upwards, and the lower snap-fit surface 11 is stressed downwards. When the upper snap-fit surface 10 and the lower snap-fit surface 11 are snapped and fixed with the multiple interlocking grooves 16 respectively, the side surfaces of the two heat exchanger plates 1 are simultaneously subjected to upward and downward reaction forces when they are inserted into each other, which helps to improve the connection stability of the two heat exchanger plates 1. The entire interlocking plate 9 is made of Monel alloy 400, which has high temperature resistance and is easy to process and thus can be extended, thereby processing the interlocking plate 9 into a groove shape suitable for the interlocking grooves 16.
[0044] The implementation principle of a fluid guiding structure in this application embodiment is as follows: The plate heat exchanger is composed of multiple heat exchanger plates 1, and each heat exchanger plate 1 is arranged in a row and in pairs. One side surface of each adjacent heat exchanger plate 1 is sealed and connected by a front sealing plate 14 and a rear sealing plate 15 of the adjacent heat exchanger plate 1. With the connection of the front sealing plate 14 and the rear sealing plate 15, the flow guide plate 8 of the heat exchanger plate 1 abuts against the rear end surface of the adjacent heat exchanger plate 1, and the interactive plate 9 is inserted into the interactive inclined groove 16 of the adjacent heat exchanger plate 1.
[0045] At this time, as the external medium pipeline delivers cold and hot medium (cold and hot medium are delivered to the surfaces of multiple heat exchanger plates 1 at intervals), as the medium flows into the surface of the heat exchanger plate 1, it flows down into the staggered groove 12 along the direction of the guide groove plate 8 toward the output straight groove 13. During the flow in the staggered groove 12, it exchanges heat with the opposite temperature medium of the heat exchanger plates 1 on both sides. When the medium passes through the extended surface of the interactive plate 9, it flows into the range of the interactive inclined groove 16 of the adjacent heat exchanger plate 1 along the extended surface of the interactive plate 9.
[0046] At this time, the surfaces of adjacent heat exchanger plates 1 exchange heat synchronously, thereby performing secondary heat exchange on the medium within the range of the interactive inclined groove 16. The medium in the heat exchanger plate 1 is subjected to heat exchange from the medium on both sides of the heat exchanger plate 1, and at the same time, it is subjected to secondary heat exchange from the interactive inclined groove 16, thereby increasing the contact area of the heat exchange path and improving the heat exchange effect of the medium.
[0047] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A fluid guiding structure, characterized in that: The device includes multiple heat exchanger plates (1) arranged in parallel. One side of the surface of the heat exchanger plate (1) is provided with a flow-blocking plate (2) for guiding the fluid. A positioning block (3) is fixed on one side of the middle of the flow-blocking plate (2). A spring pressure plate slot (6) for positioning is provided on the side of the middle of the flow-blocking plate (2) located at the positioning block (3). A slot seat (4) for fixing the spring pressure plate slot (6) is provided on one side of the spring pressure plate slot (6). Multi-layer spring pressure plates (5) for pressing the heat exchanger plate (1) are provided at both ends of the side of the spring pressure plate slot (6) away from the slot seat (4).
2. The fluid guiding structure according to claim 1, characterized in that: Multiple rows of flow guide plates (8) are arranged and fixed on the surface of multiple heat exchanger plates (1), and the multiple rows of flow guide plates (8) are arranged in a cross-flow distribution to form staggered grooves (12).
3. The fluid guiding structure according to claim 2, characterized in that: The surfaces of the multiple rows of guide trough plates (8) are all provided with interactive plates (9), and the sides of the multiple heat exchanger plates (1) facing the interactive plates (9) are provided with interactive inclined grooves (16), which are interlocked with the interactive plates (9).
4. A fluid guiding structure according to claim 3, characterized in that: The top row of the multiple interactive panels (9) and the side of the top of the interactive groove (16) are provided with an upper contact surface (10). The row of the multiple interactive panels (9) adjacent to the one with the upper contact surface (10) and the side of the bottom of the interactive groove (16) are provided with a lower contact surface (11).
5. A fluid guiding structure according to claim 4, characterized in that: The multiple upper contact surfaces (10) and lower contact surfaces (11) are based on multiple rows of interactive plates (9) and are distributed at intervals from top to bottom.
6. A fluid guiding structure according to claim 5, characterized in that: Each of the heat exchanger plates (1) has an output straight groove (13) at the bottom of the staggered groove (12).
7. A fluid guiding structure according to claim 6, characterized in that: Each of the heat exchanger plates (1) has a front sealing plate (14) protruding from both sides of its surface, and a rear sealing plate (15) protruding from the other side of the front sealing plate (14). The front sealing plates (14) and the rear sealing plate (15) on the adjacent side are all sealed together.
8. A plate heat exchanger for use in a fluid guiding structure as described in any one of claims 1 to 7, characterized in that: It includes a plate heat exchanger housing (7) disposed on the surface of the heat exchanger plate (1) and located at the ends of two multi-layer spring plates (5), wherein the bottom ends of the plate heat exchanger housing (7) are covered and fixedly connected to the surface of the heat exchanger plate (1).